Prime Minister Prayuth Chan-ocha said Thailand is in a transition toward "a strong and sustainable democracy."
"Anything that cannot be completed during this administration will be handed over to the next," he said in a speech at the start of a three-day security conference in Singapore attended by defense ministers from several Asia-Pacific nations, including US Defense Secretary Ash Carter.
Prayuth seized power in a military coup in May 2014, saying he needed to end political confrontations that had wracked Thailand for years. He has promised to hold elections next year after several postponements, and wants to hold a referendum on Aug 7 on the draft of a new constitution that has been criticized as undemocratic and designed to keep power in the hands of the military and its allies in the country's traditional elite.
Campaigning for or against the draft is subject to nebulous rules that could land activists in prison for up to 10 years.
More From This Section
Even the sale of a "Vote No" T-shirt is considered against the law.
In May, authorities arrested eight people on charges of sedition and violation of the Computer Crime Act for material posted on Facebook that mocked Prayuth. The arrests attracted widespread criticism from local activists as well as international human rights groups.
There has been an "abuse (of) social media to engage in libel and a distortion of facts," so it is "necessary for the military to take control for a while," Prayuth said, speaking in Thai. His comments were translated into English by an interpreter.
The annual international security conference, known as the Shangri-la Dialogue, includes a session tomorrow chaired by Carter on meeting Asia's security challenges.
While the region upholds a general image of peaceful coexistence, the influence of extremists, tensions on the Korean Peninsula and territorial disputes in the South China Sea, principally between China and several Southeast Asian nations, threaten to disrupt the peace.
A United Nations arbitration court will soon rule on sovereignty over islands in the South China Sea claimed by China and the Philippines.